class Fish {
	int weight = 1;
}
class Lake {
		Fish fish;
		void setFish(Fish s){
			fish = s;
		}
		void foodFish(int m) {
			fish.weight = fish.weight+m;
		}
	}
	public class  EX4_3_1{
		public static void main(String args[]) {
			Fish redFish = new Fish();
			System.out.println(redFish.weight);
			Lake lake = new Lake();
			lake.setFish(redFish);
			lake.foodFish(120);
			System.out.println(redFish.weight);
			System.out.println(lake.fish.weight);
		}
	}

